TOYOTA 90105-10388 Flange Bolt

The genuine TOYOTA (SKU: 90105-10388) flange bolt (washer-based bolt) is a premium-quality, high-strength fastener engineered specifically to meet automotive industry standards. The integrated washer (flange) ensures optimal load distribution across fastening surfaces, preventing loosening and reducing the risk of surface damage during installation.

Technical Features and Functions

This specialized flange bolt plays a vital role in securely fastening various mechanical and structural assemblies. The flanged design eliminates the need for separate washers, enabling faster and more reliable assembly.

• Design: Hex head bolt with an integrated washer (flange), providing a larger bearing surface.
• Material Quality: High-tensile steel alloy resistant to vibration, high temperatures, and mechanical stress.
• Surface Treatment: Corrosion-resistant coating offering protection against moisture, mud, and road salts.
• Application Area: Typically used for securing suspension components, engine bay mountings, transmission elements, or other high-stress structural assemblies.

Signs of Failure and Importance of Replacement

Fastening bolts can deteriorate over time due to continuous vibration and environmental exposure. Replacing damaged or stretched bolts is essential for safe operation. Common warning signs include:

• Corrosion and Rusting: When the surface coating is compromised, rust weakens the structural integrity of the bolt.
• Thread Damage or Stretching: Overtightening or excessive mechanical load can deform threads, leading to a loss of clamping force.
• Loosening: Loss of factory torque specification can cause rattling, instability, or even complete detachment of secured components.

During maintenance and repair work, it is always recommended to adhere to factory-specified tightening torques and replace aged or single-use (torque-to-yield) bolts with new, genuine OEM parts.